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ponedjeljak, 25.10.2010.

Phone acoustic power

Phone acoustic power

Abandon the development of new battery technology allows the United States by the sound-powered phone

According to foreign media reports, has a self-powered imagine how nice the phone, it will never have to charge and maintain the normal operation of mobile phones. This is not fantasy, but Texas A & M University professor Kim Tai Xika a recent invention. This invention allows mobile phone users when they speak sound waves into energy, to provide mobile phone use, so that the common mobile phone without electricity.

Cajun working on nanotechnology, through the use of so-called piezoelectric materials, he developed a self-powered device, which does not require battery power and the like can be replaced. In particular, card payments and partners the University of Houston have found material in less than a voltage of 21 nanometers thick can be one hundred percent under the micro size of the converted energy. And, when this material larger than the specific size or less, their energy conversion rate will be greatly reduced. His findings published in the fall of the American Physical Society scientific journal "Physical Review B" on. This discovery will develop low-power far-reaching electronic products, which can develop from my supply of mobile phones, laptops, personal communications devices and a large number of other computer-related electronic products.

Many high-tech products are nano-scale components. Although the invention of card payment is small, but significant influence. His findings will enable small and convenient to extend the service life of wireless products. Because, MP3 and mobile phone, the battery life is a major problem, if you want to expand their capabilities, then you need a more powerful battery to support. And convenient self-powered device will resolve this problem, which is several federal agencies interested in the reasons for such devices. Indeed, the U.S. Defense Advanced Research Projects Agency (DARPA) has been studying how to field soldiers received their conversation of energy to power their portable equipment. In addition, sensors for detecting explosives, will greatly benefit from the self-powered technology, can reduce the testing and battery replacement.

Cajun explained that this technology is the key to piezoelectric. Is a kind of piezoelectric crystal is very interesting, when you squeeze or stretch it, it will produce different ends of the charge. This effect is called piezoelectric effect. The crystal can produce is called the piezoelectric effect piezoelectric crystal. Crystal (±-quartz) is a well-known piezoelectric crystals. Piezoelectric is not a new concept, in fact, 80 years in the 19th century French scientist was found. The first piezoelectric sonar used during World War device. Now, equipped with a piezoelectric crystal element of the instrument so that technicians steam engine, internal combustion engines and all kinds of pressure changes in the chemical equipment a reality. Can be measured using a piezoelectric crystal or even the pressure of fluids in pipes, guns, cannon fired artillery shells at the pressure when the bomb exploded, and the instantaneous pressure. In addition, the piezoelectric crystal is also widely used in the microphone and the quartz watch. Even the car ignition device has a piezoelectric crystal. Click on the button will cause the ignition to strike on piezoelectric crystals, which generate enough voltage to cause sparks and ignite the gasoline.

Major applications, a number of European dance floors of nightclubs and dance halls was built by the piezoelectric crystal can absorb and convert energy to power the pace in order to light up night clubs in the bulb. According to reports, a Hong Kong Coliseum is using this technology to the athletes energy into electricity, in order to make a light and play music. Card King said the application of piezoelectric crystal will be a higher level, especially when the emergence of nano-scale piezoelectric crystal after the application of this technology will be more extensive.

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25.10.2010. u 08:32 • 1 Komentara • Print • #

ponedjeljak, 18.10.2010.

Lithium battery cathode material

Lithium battery cathode material

Shaanxi Applied Physical Chemistry, a billion lithium battery cathode materials sales

As of October 20, Shaanxi Institute of Applied Physical Chemistry, lithium battery cathode material sales to subsection 100.7217 million yuan, the individual to achieve the civilian section of a billion in sales to the historic breakthrough in the effective implementation of the scientific and technological achievements industrialization, large-scale development of products for the people laid the foundation.

In 2004, Shaanxi Applied Physical Chemistry, lithium battery cathode materials for the project started research and development. In recent years, the lithium battery cathode materials, the rapid growth in sales. New Materials Development Center in 2005 lithium battery cathode material sales to the section of more than 370 million sold in 2006 to 2,700 million subsection, paragraph 2007, the sales to more than 7300 million in 2008, completed two months ahead of its annual sales to the section break billion element of the index, the end of 2008, the sales to the paragraph 130 million yuan.

[Solar cell market analysis] (c) supply and demand of polysilicon materials mitigation, slowing demand for semiconductors and solar cells

In recent years, due to shortage of polysilicon materials, and prices skyrocketed. The reason is in addition to Semiconductor, the solar cell demand increased dramatically. However, supply and demand in 2009 will be eased.

First, the demand for semiconductors is no longer on the growth of polysilicon. The background is the result of a global recession, stagnation of electronic equipment. Prior to the continued growth is expected to 300mm wafer demand, 2008 will be the first time in the fourth quarter of negative growth.

In addition, the growth rate of polycrystalline silicon solar cells was significantly slowed. Forced by the Spanish PV electricity price adjustment (Feed In Tariff) system such as the impact 2009 growth in demand for solar cells will be less in 2008. Nomura Securities Financial & Economic Research and Tianmu predicted that global demand for solar power generation system, in 2008 49.1% over the previous year, while 2009 growth of 25.4% than in 2008, down 23.7 percentage points.

In addition, the French research firm Yole Developpement data show that in 2009 the production capacity of polysilicon materials substantial growth over 2008 61.2%. Is the second in 2008 after an increase of 104.1%, a significant increase. Although the material manufacturers tend to release more than the actual capacity, but the manufacturers are actively expanding production capacity that is no doubt.

Solar power system needs of the material also includes materials other than crystalline silicon. The crystalline silicon-based materials, other than the high rate of growth, the growth rate of production of polysilicon materials like solar cells will exceed demand growth.

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18.10.2010. u 05:01 • 0 Komentara • Print • #

utorak, 12.10.2010.

Ireland issued a warning on Chinese-made lithium batteries

Ireland issued a warning on Chinese-made lithium batteries

November 11, according to foreign reports, the Irish Department of Consumer Affairs, warning the EU market in China produced a bulletin called "ATL" for lithium products, goods warning issued. These products are produced in Guangdong, China, through Italy into the EU market. The warning number 092689/08, warning due to leakage.

Cobalt production in Zambia in August and the fall in exports

November 4th power in August of copper and cobalt production in Zambia have declined, copper production from 49,623 tons last year reduced to the current 45,067 tons, while cobalt production from the same period last year to 512 tons to 426 tons. Copper exports from 52,360 tons last year decreased to 39,716 tons, while exports of cobalt fell by 23% to 382 tons.

But the cumulative figures from the 1-8 month view, copper production increased by 12.9% to 377,600 tons, exports from the same period last year 31.82 million tons to 355,700 tons. The cumulative production of cobalt 3,185 tons last year but never reduced to 3081 tons, exports decreased from 3139 tons to 3098 tons.

Chaotianmen seized 30,000 "distorted" battery

Nanfu large and small, gold train, well-known brands such as Duracell batteries, messy pile in the long table, and some have a battery fluid leakage. Yesterday, the Yuzhong District Bureau of Quality Supervision reports from the public, near the police station in the Chaotianmen Yijuminlou, the seized more than 30,000 pieces of "distorted" battery, involving 60,000 yuan. Has been investigation.

"From the current master of the situation, these batteries have leaked into the market, mainly in the Marine Chaotianmen Commodity Market." Quality supervision to remind the public to buy such a "distorted" battery, complaints can be reported immediately by calling 12365.

Try their hand material for a small battery charging wind turbines

This is a completely green wind charger, as long as the battery into the inside, then absorption of glass on the charger OK. Of course the premise is to have wind, no wind? Then you blow mouth, fan to fan, or toggle it with your fingers, that is, they have to involvement. Designer: Ji-yun Kim, Soon-young Yang & Hwan-ju Jeon.

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12.10.2010. u 08:39 • 0 Komentara • Print • #

petak, 08.10.2010.

New fuel cell catalyst

New fuel cell catalyst

Methanol fuel cell is an alternative to fossil fuel cells, efficient use can be a long time. The fuel cell through the use of electro-oxidation of the chemical reaction to produce electricity, usually induced chemical reactions inside a fuel cell requires platinum catalyst, as platinum is an expensive metal, so the use of this technology is very limited. It is reported that chemists JoseEBarranco will likely change this situation, according to his research, the use of cheaper fuel cell catalysts has been developed. Barranco with nickel, niobium, antimony and ruthenium as a catalyst made of alloy, the content of platinum in the catalyst to a minimum (only 1%). The new alloy also improves the catalytic process of carbon monoxide, carbon dioxide conversion. With the successful test catalysts, Barranco hope to conduct further experiments to improve the efficiency of the catalyst 9 to 13 times. This also means that the efficiency of methanol fuel cells will be increased by 50% or more.

ST's fuel cell ", then use the official fuel cartridge can prevent electrolyte dry"

ST (STMicroelectronics, ST) in the September 30, 2008 at Makuhari Messe from the International Convention and Exhibition Center at the "CEATEC JAPAN 2008" on the presentation of the portable device using a micro-fuel cells.

ST's micro fuel cell from the core unit (FCCU), Energy Management Unit (EMU), the hydrogen fuel tank, valves and connecting lines form. Low-pressure hydrogen fuel. Use of water can produce low-pressure hydrogen generator hydrogen as a fuel to supply. Water stored in the fuel box, security is high. Is currently working with major manufacturers to develop fuel fuel cartridge box.

Use low-pressure hydrogen fuel cell produces electrolytes if dry, water, etc., or electrodes, power generation efficiency will be reduced. The ST's fuel cell can be built-in sensors detect moisture in the FCCU, according to feedback information to adjust the EMU supply of hydrogen can be produced by chemical reaction of water to improve electrolyte and humidity, or by increasing the cell internal temperature to evaporate the water.

The demonstration, not used in development of the fuel cartridge, but the use of the performance of different ordinary hydrogen generating device, "can not adjust the electrolyte and humidity" (ST Company New Energies Business Unit, Fuel Cell Product Leader, Industrial & Multisegment Sector, ASD & IPAD Division, Mathieu Roy). The fuel cell by air to Japan, France, electrolytes have been dry. And the temporary use of lower performance hydrogen generating device, only about 300mW output power and therefore can not produce enough water to increase the electrolyte humidity.

However, "in 2008 will complete the fuel cartridge development, the CEATEC 2009 show, including the fuel cartridge to the fuel cell, including" (Roy). Fuel cartridge developed by several companies, "as with other fuel cartridge, the convenience store sales in the world." (Roy).

EMU and the FCCU on a single chip are concerned, "will be manufactured by other processes, the use of modules integrated approach" (Roy). The integrated 9 FCCU, an empty region. Plan for the future in this area with EMU. "EMU will use the standard CMOS process, the FCCU will use a simple special process. Module integration, efficiency and excellent scalable" (Roy).

Next year will further enhance the reliability and durability of the battery. Production for 2010, the goal is to reduce the dimensions to 40mm x 50mm x 4mm.

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08.10.2010. u 04:14 • 1 Komentara • Print • #

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